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Synthesis of pyrolytic carbon composites using ethanol as precursorm / Aijun Li in Industrial & engineering chemistry research, Vol. 49 N° 21 (Novembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 21 (Novembre 2010) . - pp. 10421–10427 Titre : Synthesis of pyrolytic carbon composites using ethanol as precursorm Type de document : texte imprimé Auteurs : Aijun Li, Auteur ; Shouyang Zhang, Auteur ; Boris Reznik, Auteur Année de publication : 2011 Article en page(s) : pp. 10421–10427 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Pyrolytic  Ethanol Résumé : Chemical vapor infiltration and deposition of carbon fiber bundles are applied to synthesize pyrolytic carbon composites using the oxygen-containing precursor ethanol. The influence of the temperature (1373 and 1423 K) and pressure (1−7 Pa) on the microstructure and the deposition rate of pyrolytic carbon are experimentally studied. Higher partial pressures of ethanol are demonstrated to favor the growth of highly ordered graphene-like pyrocarbon, whereas lower partial pressures help to suppress the carbon texture transition. The gas-phase composition and reaction kinetics are numerically analyzed on the basis of a reacting flow model with a detailed reaction mechanism. Methane and C2 species are shown to be the dominant intermediate species of ethanol pyrolysis. According to the simulation, a large amount of CH3 radicals is produced, which explains the fact that the pyrolytic carbon from ethanol exhibits a texture similar to the one produced with CH4 as precursor. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100230b [article] Synthesis of pyrolytic carbon composites using ethanol as precursorm [texte imprimé] / Aijun Li, Auteur ; Shouyang Zhang, Auteur ; Boris Reznik, Auteur . - 2011 . - pp. 10421–10427. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 21 (Novembre 2010) . - pp. 10421–10427 Mots-clés : Pyrolytic  Ethanol Résumé : Chemical vapor infiltration and deposition of carbon fiber bundles are applied to synthesize pyrolytic carbon composites using the oxygen-containing precursor ethanol. The influence of the temperature (1373 and 1423 K) and pressure (1−7 Pa) on the microstructure and the deposition rate of pyrolytic carbon are experimentally studied. Higher partial pressures of ethanol are demonstrated to favor the growth of highly ordered graphene-like pyrocarbon, whereas lower partial pressures help to suppress the carbon texture transition. The gas-phase composition and reaction kinetics are numerically analyzed on the basis of a reacting flow model with a detailed reaction mechanism. Methane and C2 species are shown to be the dominant intermediate species of ethanol pyrolysis. According to the simulation, a large amount of CH3 radicals is produced, which explains the fact that the pyrolytic carbon from ethanol exhibits a texture similar to the one produced with CH4 as precursor. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100230b